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android: ashmem implementation of mirrored memory

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This commit is contained in:
Michael Maltese 2016-11-03 23:18:36 -07:00
parent ddbe4a8bf2
commit dd74dd773d
1 changed files with 21 additions and 1 deletions
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22
src/os.c
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@ -78,6 +78,12 @@
#include <mach/mach.h> #include <mach/mach.h>
#endif #endif
#ifdef __ANDROID__
#include <fcntl.h>
#include <linux/ashmem.h>
#include <sys/ioctl.h>
#endif
struct SoundIoOsThread { struct SoundIoOsThread {
#if defined(SOUNDIO_OS_WINDOWS) #if defined(SOUNDIO_OS_WINDOWS)
HANDLE handle; HANDLE handle;
@ -670,11 +676,24 @@ int soundio_os_init_mirrored_memory(struct SoundIoOsMirroredMemory *mem, size_t
break; break;
} }
#else #else
int fd;
#ifdef __ANDROID__
fd = open("/dev/ashmem", O_RDWR);
if (fd < 0)
return SoundIoErrorSystemResources;
int ret = ioctl(fd, ASHMEM_SET_SIZE, actual_capacity);
if (ret < 0) {
close(fd);
return SoundIoErrorSystemResources;
}
#else
char shm_path[] = "/dev/shm/soundio-XXXXXX"; char shm_path[] = "/dev/shm/soundio-XXXXXX";
char tmp_path[] = "/tmp/soundio-XXXXXX"; char tmp_path[] = "/tmp/soundio-XXXXXX";
char *chosen_path; char *chosen_path;
int fd = mkstemp(shm_path); fd = mkstemp(shm_path);
if (fd < 0) { if (fd < 0) {
fd = mkstemp(tmp_path); fd = mkstemp(tmp_path);
if (fd < 0) { if (fd < 0) {
@ -695,6 +714,7 @@ int soundio_os_init_mirrored_memory(struct SoundIoOsMirroredMemory *mem, size_t
close(fd); close(fd);
return SoundIoErrorSystemResources; return SoundIoErrorSystemResources;
} }
#endif
char *address = (char*)mmap(NULL, actual_capacity * 2, PROT_NONE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); char *address = (char*)mmap(NULL, actual_capacity * 2, PROT_NONE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
if (address == MAP_FAILED) { if (address == MAP_FAILED) {